21992391

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4451}}^1$

素因数の和:4524

約数の個数: 20

約数和(自身を含む): 33398904

約数和(自身を除く): 11406513

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4451, 4941, 13353, 40059, 120177, 271511, 360531, 814533, 2443599, 7330797, 21992391]

約数ペア:

[(1, 21992391), (3, 7330797), (9, 2443599), (27, 814533), (61, 360531), (81, 271511), (183, 120177), (549, 40059), (1647, 13353), (4451, 4941)]